Methods and apparatus for simulating a distributed business process

ABSTRACT

Methods and apparatus for simulating a distributed business process are disclosed. The methods and apparatus simulate an interdependent business process, such as a financial transaction system, in a secure distributed manner. Each business entity that is part of the interdependent business process models itself on a local client device at any chosen level of detail. A simulation server connects the separate client based simulations into one large simulation. Details of each local simulation may be hidden from other simulation participants. However, interruptions in business flow caused by simulated disruptions introduced at the simulation server and/or a client device are propagated to all of the effected simulation participants via the simulation server. In addition, if a client based model is not available, the server supplies a software agent to replace the inputs and outputs normally associated with that portion of the overall simulation.

PRIORITY CLAIM

This application is a continuation of U.S. patent application Ser. No. 13/187,700, filed on Jul. 21, 2011, which is a continuation of U.S. patent application Ser. No. 12/828,777, filed on Jul. 1, 2010, now U.S. Pat. No. 7,996,205, which is a continuation of U.S. patent application Ser. No. 11/556,462, filed on Nov. 3, 2006, now U.S. Pat. No. 7,752,027, which claims priority to and the benefit of U.S. Provisional Patent Application Ser. No. 60/823,879 filed on Aug. 29, 2006, the entire contents of each of which are hereby incorporated.

GOVERNMENT LICENSE RIGHTS

This invention was made with Government support under Contract FA8750-05-2-0021 awarded by the Air Force. The Government has certain rights in this invention.

TECHNICAL FIELD

The present disclosure relates in general to computer based simulations, and, in particular, to methods and apparatus for simulating a distributed business process.

BACKGROUND

Administrators of complex business processes typically take precautions to help ensure that their business processes continue to operate despite the occurrences of certain unwanted events. For example, many business processes use computer systems for at least a portion of the business process. Often, precautions are taken to ensure that data continues to flow in to and out of these computer systems despite failures of certain devices in the system. For example, backup storage systems and redundant communications paths are often used to increase the integrality of a computing system.

However, these precautions are normally only taken within the particular entity. Typically, a business that relies on another business cannot force the other business to build robust systems, and most businesses are not willing to share the internal details of their operation with other businesses. This is especially true in highly regulated businesses such as banking, finance, health care, energy, etc. As a result, each business typically takes an approach that attempts to assume that any incoming and/or outgoing communication path may be disrupted.

Network simulation tools help the administrator visualize what devices are in his/her particular network and how those devices are connected to other devices in his/her network. In addition, network simulation tools may allow the administrator to make certain assumptions about devices outside of his/her business that have a direct relationship with one or more devices inside his/her business.

However, these types of assumptions may not be accurate and typically do not take into account ripple effects caused by indirect relationships with other devices. In order to accurately simulate these ripple effects, the network administrator would need to know information about devices outside of his/her business. In addition, network simulations tools do not allow a user to simulate his overall business process. For example, if a portion of a business process is to manually switch from a local call center to a foreign call center in the event of a failure at the local call center, network simulations tools do not allow these “people processes” to be simulated, and business people are typically not willing to expose these types of business model details to other organizations.

SUMMARY

The simulation system (i.e., methods, apparatus, and/or software) disclosed herein solves these problems. Unlike a network simulation tool, the disclosed business process simulation system allows enterprise managers to practice business responses in a risk free environment. Specifically, the simulation system disclosed herein uses a secure distributed model wherein each business entity models itself on a local client device at any chosen level of detail, and a simulation server connects the separate client based simulations into one large simulation without exposing unauthorized details of one participant's internal simulation details to another simulation participant. In this manner, business entities participating in the simulation can exercise different fault scenarios and response strategies with other business entities. If a client device based model is not available, the server supplies a software agent to replace the inputs and outputs normally associated with that portion of the overall simulation. Interruptions in data and other business process flows caused by simulated disruptions introduced at the simulation server and/or a client device are propagated to all of the affected simulation participants via the simulation server. As each simulation participant receives the updated simulation scenario, business decisions are made by the simulation participants, and the effect of those decisions is propagated to all of the simulation participants. As a result, each simulation participant can share the benefit of an accurate model of its portion of the overall business process without exposing internal details of their business systems and processes.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a high level block diagram of a business system showing direct and indirect relationships between business entities.

FIG. 2 is a high level block diagram of a communications system.

FIG. 3 is a more detailed block diagram showing one example of a computing device.

FIG. 4 is a block diagram showing example logical connections between a simulation server and a plurality of business entities.

FIG. 5 is a flowchart of an example process to simulate a financial transaction system.

FIG. 6 is a screenshot of a top level view of an example graphical simulation tool used to create and/or modify a client based simulation model.

FIG. 7 is a screenshot of an example portion of internal simulation details associated with a local simulation model.

FIG. 8 is a screenshot of an example simulation model showing usage percentages that are broken down into multiple levels.

FIG. 9 is a screenshot of an example health graph.

FIG. 10 is a screenshot of an example simulation model using a tree structure.

FIG. 11 is a screenshot of another example simulation model using a tree structure.

FIG. 12 is a screenshot of yet another example simulation model using a tree structure and showing a details table.

FIG. 13 is a screenshot of a top level view of an example client based simulation model showing a connections table.

FIG. 14 is a screenshot of an example simulation model being edited via a table that includes a trigger value.

FIG. 15 is a screenshot of an example simulation from a server view and two different client views.

FIG. 16 is a screenshot of an example simulation from a server view when a server tab is selected.

FIG. 17 is a screenshot of an example simulation from a client view when a client tab is selected.

FIG. 18 is a screenshot of a top level view of an example simulation when a disruption occurs.

FIG. 19 is a screenshot of a lower level view of an example simulation when a disruption occurs.

FIG. 20 is a screenshot of an example alert message.

FIG. 21 is an example business system tree structure used to define a business system, expose certain details of that business system to other simulation participants, and/or play out different scenarios.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

FIG. 1 is a high level block diagram of a business system 100 showing direct and indirect relationships between business entities 102-111. Example business entities include clearing member firms, clearing corporations, exchange brokers, settlement corporations, settlement and depository banks, price reporting corporations, service bureaus, power companies, and telephone companies. In the example illustrated in FIG. 1, five financial institutions 102-110 are shown. However, any number of financial institutions may be simulated by the disclosed system. In addition to the financial institutions 102-110, other business entities may be included in the simulation. For example, one or more utility companies such as a power company, a telephone company, etc. may be included in the simulation.

Each business entity may have one or more direct and one or more indirect relationships. For example, financial institution 104 has a direct relationship with financial institution 102, financial institution 106, and financial institution 108. Specifically, financial institution 104 takes inputs directly from financial institution 102 and financial institution 108. In addition, financial institution 104 feeds outputs directly to financial institution 106 and financial institution 108. These relationships may be based on any user defined criteria. For example, relationships between business entities may be at a business model level and/or a data connectivity level. Some business entities may have direct relationships with a large number of the other business entities. For example, a power company may have a direct relationship with all of the business entities in a particular geographic region.

Financial institution 104 may have an indirect relationship with financial institution 106, financial institution 108, and/or financial institution 110. Specifically, financial institution 106 may indirectly affect financial institution 104 via financial institution 102. In addition, financial institution 106 may affect financial institution 110, which in turn may affect financial institution 108, which in turn may affect financial institution 104. Financial institution 108 may have a direct affect on financial institution 104 and an indirect affect on financial institution 104 via financial institution 102. In fact, financial institution 104 may affect financial institution 108, which in turn may affect financial institution 102, which in turn may loop all the way back to affect financial institution 104. In this example, financial institution 104 does not have an indirect relationship with financial institution 102, because financial institution 102 does not send outputs to any financial institutions other than financial institution 104.

In order to simulate the effect of a disruption somewhere in the business system 100 including any ripple effects caused by both the direct and the indirect relationships, a network communications system is preferably used. A high level block diagram of an example network communications system 200 is illustrated in FIG. 2. The illustrated system 200 includes one or more client devices associated with the business entities 102-111 and one or more simulation servers 202. Each of these devices may communicate with each other via a connection to one or more communications channels 204 such as the Internet and/or some other data network, including, but not limited to, any suitable wide area network or local area network. It will be appreciated that any of the devices described herein may be directly connected to each other instead of over a network.

The simulation server 202 may include one or more computing devices 206 and one or more databases 208. One simulation server 202 may interact with a large number of other devices. Accordingly, each simulation server 202 is typically a high end computer with a large storage capacity, one or more fast microprocessors, and one or more high speed network connections. Conversely, relative to a typical server 202, each client device associated with the business entities 102-111 typically includes less storage capacity, a single microprocessor, and a single network connection. During a simulation, each participating client device is associated with one or more decision makers 212-221.

A more detailed block diagram of the electrical systems of an example computing device (e.g., a client 102-111 or a server 202) is illustrated in FIG. 3. Although the electrical systems of these computing devices 102-111, 202 may be similar, the structural differences between these devices are well known. The example computing device 102-111, 202 includes a main unit 302 which preferably includes one or more processors 304 electrically coupled by an address/data bus 306 to one or more memory devices 308, other computer circuitry 310, and one or more interface circuits 312. The processor 304 may be any suitable processor, such as a microprocessor from the INTEL PENTIUM® family of microprocessors. The memory 308 preferably includes volatile memory and non-volatile memory. Preferably, the memory 308 stores a software program that interacts with the other devices in the communications system 200 as described below. This program may be executed by the processor 304 in any suitable manner. The memory 308 may also store digital data indicative of documents, files, programs, web pages, etc. retrieved from another computing device 102-111, 202 and/or loaded via an input device 314.

The interface circuit 312 may be implemented using any suitable interface standard, such as an Ethernet interface and/or a Universal Serial Bus (USB) interface. One or more input devices 314 may be connected to the interface circuit 312 for entering data and commands into the main unit 302. For example, the input device 314 may be a keyboard, mouse, touch screen, track pad, track ball, isopoint, and/or a voice recognition system.

One or more displays, printers, speakers, and/or other output devices 316 may also be connected to the main unit 302 via the interface circuit 312. The display 316 may be a cathode ray tube (CRTs), liquid crystal displays (LCDs), or any other type of display. The display 316 generates visual displays of data generated during operation of the computing device 102-111, 202. The visual displays may include prompts for human input, run time statistics, calculated values, data, etc.

One or more storage devices 318 may also be connected to the main unit 302 via the interface circuit 312. For example, a hard drive, CD drive, DVD drive, and/or other storage devices may be connected to the main unit 302. The storage devices 318 may store any type of suitable data.

The computing device 102-111, 202 may also exchange data with other network devices 320 via a connection to the network 204. The network connection may be any type of network connection, such as an Ethernet connection, digital subscriber line (DSL), telephone line, coaxial cable, etc. Users of the communications system 100 may be required to register with one or more of the computing devices 102-111, 202. In such an instance, each user may choose a user identifier (e.g., e-mail address) and a password which may be required for the activation of services. The user identifier and password may be passed across the network 204 using encryption. Alternatively, the user identifier and/or password may be assigned by the computing device 102-111, 202.

As discussed above, the computing devices 102-111, 202 communicate via the network. As discussed in more detail below, each computing device 102-111, 202 operated by the associated decision makers 212-221 performs a portion of an overall simulation. FIG. 4 is a block diagram showing example logical connections between a simulation server 202 and a plurality of business entity client devices 102-106, 111. In this example, each participating business entity client device 102-111 executes a local simulation model 402-411. Each local simulation model 402-411 communicates with a simulation engine 422 via a corresponding business entity simulation interface 412-420. The simulation interfaces 412-420 may be separate as shown, or the simulation interfaces 412-420 may be combined.

The simulation interfaces 412-420 determine if the corresponding client device 102-111 is connected and participating. If a client device 102-111 is not connected and participating when a simulation is being executed, the simulation interface 412-420 interacts with a corresponding server simulation model 422-430 instead of the client simulation model 402-411. For example, financial institutions 108-110 are not connected in the example of FIG. 4. In such an instance, icons representing the client simulation model 402-411 are preferably grayed out. Preferably, client simulation models 402-411 are accurate representations of actual business models created by the associated financial institutions. In contrast, server simulation models 422-430 are preferably substitutes for one or more client simulation models 402-411. The server simulation models 422-430 may be default models for the type of business entity 102-111 that is not connected, and/or the server simulation models 422-430 may be modified.

A flowchart of an example process 500 to simulate a business system such as a financial transaction system is illustrated in FIG. 5. Preferably, the simulation process 500 is embodied in one or more software programs which is stored in one or more memories and executed by one or more processors. For example, the simulation process 500 may be software running on the simulation server 202 and/or one or more of the business entity client devices 102-111. Although the simulation process 500 is described with reference to the flowchart illustrated in FIG. 5, it will be appreciated that many other methods of performing the acts associated with simulation process 500 may be used. For example, the order of many of the steps may be changed, and some of the steps described may be optional.

Generally, the simulation process 500 executes a business system simulation such as a financial transaction simulation in a secure distributed manner by keeping details associated with each business entity's business model (e.g., financial institution model 402-410) local to a client device 102-111 associated with that business entity and routing data from one local simulation 402-411 to another local simulation 402-411 via the simulation server 202. In addition, the simulation server 202 acts as the overall master of the simulation and supplies server based simulation modules to replace unconnected business entities 102-111. Interruptions in data and other business flows caused by simulated disruptions and decision maker's reactions to those disruptions are propagated to all of the effected simulation participants via the simulation server 202. These disruptions and reactions may be introduced at the simulation server 202 and/or at any client device 102-111.

More specifically, each business entity creates a local client based simulation model 402-411 (block 502). As described in more detail below with references to example screenshots of the simulation system, each business entity 102-111 creates a simulation model of itself and indicates connections to its direct relationships. As described above with reference to FIG. 1, the modeled business entities 102-111 has a direct relationship with other business entities 102-111 that directly affect the modeled business entity 102-111 and a direct relationship with other business entities 102-111 that are affected by the modeled business entity 102-111. For example, an invoked policy at one business entity 102-111 may directly affect another business entity's business model, and/or data from one business entity 102-111 may directly affect another business entity 102-111.

The client simulation model 402-411 may be as general or as specific as the designer wants the client simulation model 402-411 to be. For example, a general client simulation model 402-411 may model business rules like “if oil goes above a certain price, close all trades.” A general communications systems model may indicate that each computing system is located in the West Coast region, the Midwest region, or the East Coast region. Alternatively, a specific client simulation model 402-411 may include a plurality of details about what types of events affect what type of trades and/or details about the buildings and cities where the computing systems are located.

Once the designer of the local client based simulation model 402-411 is satisfied with the local client based simulation of his own business entity 102-111, the designer may connect the local client based simulation model 402-411 to the client simulation models of other business entities 102-111 by registering with the simulation server 202 (block 504). The details of the client based simulations 402-411 are not exposed to the simulation server 202 unless the designer chooses to expose one or more levels of detail. For example, a business entity 102-111 may choose to expose details about the geographic locations and/or roles of its facilities but not what business rules those facilities follow and/or not how many or what type of devices are located at those facilities.

After one or more client based simulations 402-411 are connected via the simulation server 202, the simulation server 202 can execute one or more steps of the overall financial simulation (block 506). However, certain outputs from the overall financial simulation can only be processed by the connected client based simulations 402-411 and the corresponding decision makers 212-221, and certain inputs to the overall financial simulation can only come from the connected client based simulations 402-411 and the corresponding decision makers 212-221. Accordingly, a tailored view of the output of the overall business simulation is sent to each connected business entity's client simulation 402-411 (block 508).

In other words, each client simulation 402-411 receives inputs associated with that client simulation 402-411 based on that client simulation's role within the overall business model. For example, data indicative of a plurality of stock purchases may be sent from the simulation server 202 to a client based simulation 402-411 of a clearing corporation 110. Preferably, the simulation data sent to each client simulation 402-411 is also scaled to match that client simulation's role. For example, a small brokerage would receive fewer trades than a large brokerage. Accordingly, by using pie charts to define simulation variables, each entity can define its interactions as a percentage of a whole (e.g., as a percentage of a daily average trading volume). In addition, by using a hierarchy of optional pie charts, each entity can choose to define its business model at any level of detail.

If a client simulation 402-411 is disabled or otherwise unavailable, the output of the overall financial simulation may be sent to a corresponding server based simulation 422-430 representing the client based simulation 402-411 (block 508). As discussed above, client simulation models 402-411 are preferably accurate representations of actual business models, and server simulation models 422-430 are preferably substitutes for one or more client simulation models 402-411. For example, when a particular client based simulation 402-411 is not connected, the simulation server 202 may use a server based simulation representing the particular client based simulation 402-411. The server based simulation may be a simple software stub that accepts and/or generates a certain amount of canned financial transactions, or the server based simulation may be a complex financial simulation model. For example, the server based simulation may include the exposed portion of the corresponding client based simulation 402-411.

Each connected business entity 102-111 also sends outputs from its local client based simulation 402-411 to the simulation server 202 (block 510). For example, data indicative of a plurality of stock purchase confirmations may be sent from a client based simulation 402-411 to the simulation server 202. Alternatively, the output of a server based simulation representing a client based simulation 402-411 may be sent to the simulation server 202 (block 510).

Each business entity 102-111 participating in the simulation, and/or other business entities 102-111 given permission, may view the simulation at varying permission levels (block 512). However, each business entity 102-111 can only view and modify the internal details of its own model unless the other business entities 102-111 explicitly expose their own details (block 512). For example, one business entity 102-111 may model itself with four layers of detail and expose the first two layers of that detail to other business entities 102-111 for viewing but not for modifying.

Once the overall simulation is running, any authorized business entity 102-111 may introduce one or more disruptions (block 514). For example, a business entity 102-111 may shut down all business operations at a particular geographic location. Although other participants in the simulation may not have access to low levels of the simulation detail (i.e., that financial institution 102-110 did not expose that it had certain business rules and/or devices at a certain location), other business entities 102-111 affected by the disruption, will see the effect of the disruption on their view of the overall simulation. In addition, chronological disruption scenarios may be executed. For example, a user of a simulation may want to see the effect of executing one business rule at one time and another business rule at a subsequent time.

Any modifications to client simulation models 402-411, any new client simulation models 402-411, any new connections between client simulation models, and any exposed disruptions, are uploaded to the simulation server 202 (block 516). Subsequently, the process steps 506-516 repeat. As a result, the overall simulation, including the affect of any disruptions is viewable by all authorized simulation participants.

FIG. 6 is a screenshot of a top level view of an example graphical simulation tool 600 used to create and/or modify a client based simulation model 402-411. In this example, the graphical simulation tool 600 includes a design canvas 602 where icons representing business entities 102-111 may be placed from a palette of available icons (not shown). In this example, a designer for a financial institution 104 is creating a client simulation model 404 called “BrokerCo.” As indicated by connector lines 604, BrokerCo has direct relationships with its customers 102, their counter parties 106, one or more exchanges 108, one or more clearing corporations 110, and one or more third party providers 112.

Each business entity 102-112 represented in the simulation is modeled by a hierarchy of business entity detail. A branch indicator 606 associated with each business entity 102-112 indicates the number of branches below that level of the model. For example, the BrokerCo icon 104 includes two branch indicators 606.

As shown in a drilldown window 702 associated with the BrokerCo business entity 104 (see FIG. 7), these two branch indicators 606 are indicative of two geographical locations associated with the BrokerCo line of business. Specifically, the BrokerCo example includes a Jersey City location 704 and a San Francisco location 706.

In another drilldown window 708, the Jersey City location 704 is broken down into a first building 710 and a second building 712. In a another drilldown window 714, the first building 710 is broken down into a first computer system 716 and a second computer system 718. The final drilldown window 720 in this example shows usage percentages for the first computer system 716 in a pie chart 722. The user can create and label any number of sections in the pie chart, and the percentages may be set by entering a number, dragging a scroll bar 724, dragging a pie edge 726, and/or any other suitable manner. Although computer systems and their responses to outside data are used as examples thorough out this description, it will be appreciated that any business rules may be simulated. For example, person to person interactions, person to machine interactions, and machine to person interactions may be simulated.

Usage percentages may be broken down into any number of standard and/or custom levels. The purpose of each level and whether a level is exposed to other users is determined by the simulation designer. In this manner, the system may be tailored and scaled to fit different types of users (e.g., large institutions and small institutions). For example, in FIG. 8 the customers icon 102 is first broken down into 20% mutual fund customers 802, 10% retail customers 804, 10% third party customers 806, and 60% institutional customers 808. Then the mutual fund customers 802 are further broken down into 18% from Business 1 (810), 42% from Business 2 (812), 30% from Business 3 (814), and 10% from Business 4 (816).

In addition to the usage percentages described above, each element defined in a simulation model may be associated with a health percentage 902 in a health graph 900 as shown in FIG. 9. The health of an entity may be measured in time, money, and/or any other suitable units. In this example, a minimum health percentage 904 and a maximum health percentage 906 is defined for each hour 908 of a day. Different days of the week and months of the year may have different health percentage definitions. For example, the “health” of a broker personal element may be lower on certain holidays. Values in the health graph 900 may be edited in a table and/or by graphically dragging one or more grip points in the health graph 900. During execution of the simulation, the actual health percentage 910 may be displayed on the health graph 900. If the actual health percentage 910 goes above the maximum health percentage 906 and/or below the minimum health percentage 904, the system may generate an alert (see FIG. 20).

Information in a simulation model may also be viewed and modified using a tree structure 1002 as shown in FIGS. 10-12. From the tree structure 1002, icons can be added, deleted, expanded, collapsed, dragged to another portion of the simulation model, and/or dragged to another simulation. For example, if a business entity sells all of the assets at a particular location, the simulation model of that location may be moved from the seller's simulation model to the buyer's simulation model. In the example shown in FIG. 12, the “Transfer” role 1202 of the BrokerCo finical institution 104 is selected. As a result, a transfer table 1204 is displayed. The example transfer table 1204 includes a name 1206, a percent 1208, and a speed 1210 for each of the three examples shown. By selecting other icons, other tables may be displayed. The user may add, delete, and/or modify the simulation model via these tables.

In addition to editing business entities 102-112 of the simulation model via tables, connections between business entities 102-112 may be edited via a connections table 1302 when the user selects a connector line 604, as shown in FIG. 13. In this example, the connections table 1302 includes a “From” column 1304, a “To” column 1306, a “Physical” column 1308, and a “Protocol” column 1310. The “From” column 1304 indicates a starting business entity 102-112 for a connection, and the “To” column 1306 indicates an ending business entity 102-112 for the connection. The “Physical” column 1308 indicates the physical type of connection (e.g., ISDN, T1, T3, OC3, fiber optic, etc.), and the “Protocol” column 1310 indicates the protocol used on the connection (e.g., DOT, voice, FAX, etc.).

Another example of editing a simulation model via a table 1402 is illustrated in FIG. 14. In this example, details associated with a “Communication” branch 1404 of a “Clearing Corporation” 1406 are being edited. The table 1402 includes a “Name” column 1408, a “Health” column 1410, an “Excess” column 1412, a “Location” column 1414, a “Cost” column 1416, a “Trigger” column 1418, a “Lag Time” column 1420, and a “Priority” column 1422. This example shows that the primary communication line named “T1” is currently at 50% health. The “T1” line has a trigger indicating that if it goes below 15% health, there is a switch over to a backup communications line called “Telephone” that included 10 excess lines. However, this switch over has a cost of $5000 and takes 1 hour to complete.

When the simulation is running, different participants may have different views of the simulation. Three example views are shown in FIG. 15. A server view 1502 shows all of the nodes of the simulation at the highest level. In addition, a user with the server view may drill down to any exposed details. A BrokerCo view 1504 only shows the BrokerCo business entity 104 and its direct relationships (including a connection to Exchange 108). An Exchange view 1506 only shows the Exchange business entity 108 and its direct relationships (including a connection to BrokerCo 104).

Similarly, one participant may switch between different views. For example, the server view 1502 is shown in FIG. 16 because the user has selected a server tab 1602 as opposed to a client tab, such as a BrokerCo tab 1604. As shown in FIG. 17, when the BrokerCo tab 1604 is selected, the BrokerCo view 1504 is shown.

A master scenario events list controls one or more disruptions to the normal flow of business operations between the simulated business entities 102-112. The disruptions may be initiated by any authorized participant. For example, a user with the server view 1502 may be the only participant authorized to introduce disruptions. Alternatively, each participant may be authorized to initiate disruptions associated with itself and/or its direct relationships. A query engine allows a user to search for, select, and disrupt certain business entities 102-112. For example, a user may want to simulate a disruption of all “East Coast” business entities 102-112. In one embodiment, the logical connection maps are overlaid onto a physical location map. In such an instance, disruptions associated with certain geographies may be introduced graphically.

As shown in FIG. 18, when a business entity 102-112 is disrupted (either directly or indirectly), the branch indicator 606 associated with that business entity 102-112 acts as a meter bar to visually indicate (e.g., by a color change) that a problem is occurring. In this example, the Mutual Funds portion 1802 of the Customers entity 102 is having a problem. As a result, BrokerCo's order management role 1804 is not receiving its expected volume of business, and the color of the associated branch indicator 1804 is changed from green to yellow. In a ripple effect, BrokerCo's Trade processing role 1806 also reports a problem by changing color.

More detail about a particular problem may be viewed by calling up the pie charts that define the simulation models. For example, in FIG. 19, five example pie charts are shown. The Customers icon 102 is indicating a problem with its mutual fund branch 1902. The mutual fund pie chart 1904 shows that the problem is with the Scudder branch 1906 as indicated by an inner meter 1908 that does not arc across the entire slice and/or an inner meter 1908 that has a different color. For example, the percentage of arc of the inner meter 1908 may indicated the percentage of health. Alternatively, or in addition, the inner meter 1908 may be colored a first color (e.g., green) for a first level of health (e.g., 100%), a second color (e.g., yellow) for a second level of health (e.g., 50%-99%), and a third color (e.g., red) for a third level of health (e.g., 0%-49%).

Drilling down further in this example reveals that the T1 line 1910 at Scudder 1906 is almost completely down. As a result, counter parties 106 are starting to experience problems 1912, 1914 and BrokerCo 102 is starting to experience problems 1916, 1918. As shown in FIG. 20, whenever a business entity 102-112 experiences a problem, an alert message 2000 may be generated. These alerts may be triggered by thresholds set by the user.

FIG. 21 is an example business system tree structure 2100 used to define a business system, expose certain details of that business system to other simulation participants, and/or play out different scenarios. As described above, each client simulation model 402-411 may be constructed using this example hierarchy. For example, a user could define what devices are located at what locations within an organization and what roles those devices play in the business model for that organization as shown in FIG. 11. Once a user has defined his/her client simulation model 402-411, the user may use the tree structure 2100 to select what levels of detail other simulation participants may see. For example, the user may choose to expose all details at the role level and above as shown in FIG. 11. During a simulation scenario, participants may respond to simulated events quickly using the tree structure 2100. For example, if flood is predicted for a particular geographical region, a simulation participant may quickly select that region in the tree structure 2100, shut all of the devices at that location down, and start a transfer process to use a backup location for those business functions. If switching over to that backup location takes one hour, other simulation participants may be directly or indirectly affected by the fact that the original location has been shut down.

In summary, persons of ordinary skill in the art will readily appreciate that methods and apparatus for simulating a distributed business process are disclosed. Specifically, the simulation system disclosed herein uses a secure distributed model wherein each business entity models itself on a local client device at any chosen level of detail, and a simulation server connects the separate client based simulations into one large simulation without exposing unauthorized details of one participant's internal simulation details to another simulation participant.

The foregoing description has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the example embodiments disclosed. Many modifications and variations are possible in light of the above teachings. It is intended that the scope of the invention be limited not by this detailed description of examples, but rather by the claims appended hereto. 

What is claimed is:
 1. An apparatus to execute a business process simulation, the apparatus comprising: a simulation server; a first client device communicatively coupled to the simulation server, the first client device (a) registering at least one output of a first simulation model with the simulation server and (b) executing a first portion of the business process simulation; a second client device communicatively coupled to the simulation server, the second client device (c) registering at least one output of a second simulation model with the simulation server and (d) executing a second different portion of the business process simulation; a third client device communicatively coupled to the simulation server, the third client device (e) registering at least one output of a third simulation model with the simulation server and (f) executing a third portion of the business process simulation, the third portion of the business process simulation having an indirect influence on the first portion of the business process simulation via the second portion of the business process simulation; and a software program executing on the simulation server, the software program (g) determining simulation data associated with (h) the first client device, (i) the second client device, and (j) the third client device, wherein the software program facilitates creation of a simulation model that includes a first plurality of simulation model details to be exposed to a simulation participant and a second plurality of simulation model details to be hidden from the simulation participant. 